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Stratigraphic Analysis . 1. Issues of Principle The role of on-site interpretation Correlations across sequence Correlations through the sequence 2. Issues of Practice A suggested order of operations An order for considering each unit Using sequence diagrams in analysis

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stratigraphic analysis

Stratigraphic Analysis

1. Issues of Principle

The role of on-site interpretation

Correlations across sequence

Correlations through the sequence

2. Issues of Practice

A suggested order of operations

An order for considering each unit

Using sequence diagrams in analysis

3. The Results of Analysis

Concepts of Grouping

Diagrammatic representation

issues of principle

Issues of Principle

The role of on-site interpretation:

formation processes, functions and correlations deduced on site vs. data-gathering distinct from data-analysis

Correlations across sequence (contemporaneity)

based on physical characteristics and position in sequence (site formation affects expected similarity).

Correlations through the sequence

not just physical similarity but site formation as a whole

issues of practice

Issues of Practice

A suggested order of operations:

colour code according to basic descriptive criteria

correlate horizontally, distinguish between construction/occupation/ destruction

relate to previous event, hence vertical block and group plan

higher-order interpretations with rationale

An order for considering each unit

critical paths and stratigraphic nodes

Using sequence diagrams to show:

Data collection methods (e.g. section vs. plan)

‘Fuzzy’ boundaries

Basic strata types by colour (soil texture and inclusions)

the results of analysis

The Results of Analysis

Concepts of Grouping

lowest order is a set of actions which make up an activity (not all actions belong with equal certainty - not necessarily to most water-tight, other analyses may break them apart)

periods of site-wide activity (line drawn across whole sequence diagram – depends on size of ‘the site’)

groupings between activity and period project-specific

Diagrammatic representation

strength of correlation

types of interpretative unit

length of unit life (stretched – land-use diagram)

phasing structure (e.g. as an overlay)